package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Dish;
import com.sky.mapper.ReportMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private ReportMapper reportMapper;
    @Autowired
    private WorkspaceService workspaceService;

    // 营业额统计
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end){

        // 封装datelist集合,存放ben到end的日期
        List<LocalDate> dateList = new ArrayList<>();
       // dateList.add(begin.plusDays(1));// 将开始日期加入到dateList中,加入1天
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
            log.info("dateList={}",begin);
        }
        // 将dateList集合转换为字符串
        //StringUtils.join(dateList,",");

        List<Double> turnoverlist = new ArrayList<>();
        //遍历dateList集合,对数据库进行查询
        for (LocalDate date : dateList) {
            // 查询日期对应的营业额
            //select sum(amount) from orders where order_time between '2023-03-01' and '2023-03-02'
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);// 开始时间
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);// 结束时间
            Map Map = new HashMap();
            Map.put("begin",beginTime);
            Map.put("end",endTime);
            Map.put("status",5);
            Double turnover = reportMapper.getTurnover(Map);
            if (turnover==null){
                turnover=0.0;
            }
            turnoverlist.add(turnover);
        }
//        // 将日期列表转换为逗号分隔的字符串
//        String dateListStr = StringUtils.join(dateList, ",");
//        // 将营业额列表转换为逗号分隔的字符串
//        String turnoverListStr = StringUtils.join(turnoverlist, ",");
//
//        // 创建并返回 TurnoverReportVO 对象
//        TurnoverReportVO turnoverReportVO = new TurnoverReportVO();
//        turnoverReportVO.setDateList(dateListStr);
//        turnoverReportVO.setTurnoverList(turnoverListStr);
//
//        return turnoverReportVO;

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverlist,","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end){
        //日期列表
        List<LocalDate> dateList = new ArrayList<>();
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //StringUtils.join(dateList,",");
        // 用户总数列表，根据日期查询
        List<Integer> newUserList = new ArrayList<>();
        // 查询新增用户
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            Integer newUser = reportMapper.getUser(map);
            newUser = newUser==null?0:newUser;
            newUserList.add(newUser);
            Integer totalUser = reportMapper.getTotalUser(map);
            totalUser = totalUser==null?0:totalUser;
            totalUserList.add(totalUser);
        }

        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }


    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        //日期列表
        List<LocalDate> dateList = new ArrayList<>();
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        // 每日订单数
        List<Integer> orderCountList = new ArrayList<>();
        // 每日有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();

        // 订单总数
        Integer totalOrderCount = 0;
        // 有效订单数
        Integer validOrderCount = 0;

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map<String, Object> params = new HashMap<>();
            params.put("begin", beginTime);
            params.put("end", endTime);

            // 查询每日订单数
            Integer orderCount = reportMapper.getOrderCount(params);
            orderCount = orderCount == null ? 0 : orderCount;
            orderCountList.add(orderCount);
            totalOrderCount += orderCount;

            // 查询每日有效订单数
            Integer validOrderCountForDay = reportMapper.getValidOrderCount(params);
            validOrderCountForDay = validOrderCountForDay == null ? 0 : validOrderCountForDay;
            validOrderCountList.add(validOrderCountForDay);
            validOrderCount += validOrderCountForDay;
        }

        // 订单完成率
        Double orderCompletionRate = totalOrderCount == 0 ? 0.0 : (double) validOrderCount / totalOrderCount;

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

    }

    @Override
    public SalesTop10ReportVO getTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesDTOS = reportMapper.getTop10(beginTime, endTime);

        List<String> names= salesDTOS.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameslist = StringUtils.join(names,",");

        List<Integer> nums=salesDTOS.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numlist = StringUtils.join(nums,",");

        return SalesTop10ReportVO.builder()
                .nameList(nameslist)
                .numberList(numlist)
                .build();

    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/baobiao.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}
